CCTV pipe line inspection has become an indispensable tool in the underground pipe maintenance industry. The advantages of CCTV pipe inspection have been proven time after time, from new pipe line acceptance to updating of underground asset registers. Continuous improvements to the camera systems, software and the development of new technology have improved the quality of the data collected and expanded the applications where these camera systems can be used.
Where you can use CCTV inspection
Many modifications for different applications have been made to the basic camera systems, for example, borehole or well inspections and floating cameras for large high flow pipe lines.
CCTV inspection systems have become more than just “pipe line” inspection systems and are capable of inspecting just about any non-man entry vessel, void or tank. Explosion proof systems are also available allowing safe inspections in hazardous atmospheres.
Here are a couple of applications where CCTV pipe line inspection systems have been used:
- Pre and post rehabilitation of sewer, water, effluent and stormwater pipes
- Pre-adoption inspections of new pipe lines
- Rehabilitation prioritization of pipe networks
- Mapping of pipe networks
- Vertical borehole inspections including penstock inlets
- Internal inspection of various tanks, reservoirs and vessels
- Sink hole exploration
- Internal inspection of chimney stacks
- Post maintenance inspections of steam pipes for power generators
Advanced CCTV Pipe Line Inspection Technology
There are a wide variety of different cameras available on the market in order to conduct pipeline inspections. These cameras are designed in order to enhance the remote inspection process. Let’s take a look at some of the models we use here at Rescue Rod for our CCTV pipeline inspection service:
Pan and Rotate Cameras
Pan and rotate (P&R) cameras have become one of the minimum requirements for most contracts or tenders. P&R gives the operator the ability to position the camera lens in order to properly identify or examine a defect. Most of the cameras produced today have a zoom and focus function giving the operator the best possible view of the pipe.
Tractors or Crawlers
Tractors are available to fit pipes from 100mm up to 2000mm. They are produced with powerful motors and are able to travel distances up to 600 meters. This, of course, is also made easier by advancements in the trailing transmission cable which are now lighter and easier to tow. Steerable tractors also allow operators to negotiate obstacles or bends in some instances. Additional lighting fitted to either the camera head or the tractor improve visibility in larger pipes, while various wheel sizes and extension attachments are available so the tractor can be adjusted to any pipe size.
Push Rod Camera Systems
Push rod camera systems are not the preferred systems to be used by many clients and operators, although they definitely have their advantages. These systems have a camera on the end of a stiff rod and are simply pushed into the pipe. Portable push rod systems are useful for inspections where access is limited e.g. inside factories, behind or high up buildings, in rodding eyes where tractors cannot be inserted, in pipes which have many bends, in short vertical inspections such as rainwater downpipes and penstock inlets etc.
Lateral Launch Systems
Lateral launch systems are a combination of a tractor system and a push rod system. The tractor is fitted with a special attachment which carries the push rod camera and is able to launch it into a connection from within the mainline in order to do a “satellite” inspection.
Laser profiling is a method of assessment which accurately measures the internal dimensions of a pipe. This is done by attaching a rod onto the front of the camera which throws a laser ring onto the wall of the pipe. The ring is filmed as the camera tractor moves through the pipe. Specialist software is used to accurately measure the changes in diameter and shape of the laser ring. The resulting data can be used to measure deformation, carrying capacity, pipe wall thickness, and in some cases, depth of flow or debris. This is an excellent tool for measuring the remaining life span of rigid pipes.
Side Scan Technology
Side scan inspections are done by taking thousands of photos as the tractor moves through the pipe. The end result is the ability to produce a 2D unfolded view of the pipe. The big advantage of this is that you can measure actual distances and areas on the 2 dimensional image which is not possible from a normal video inspection. Stitching all the images together allows the user to pan and rotate the images to view any defect at different angles, after the inspection is completed.
Another advantage of this technology is that the inspections in the field can be conducted much faster because all the videos can easily be processed in the office. Please watch the video below of the Ibak Panoramo® system, which illustrates the power of this technology. Other similar products are Digisewer® and Rico RPP®
Side scan cameras can also be used to inspect and create 3D models of manholes.
Many of the CCTV pipe line inspection systems available today have built in sonde transmitters making it easy to track the camera on the surface as it moves through the pipe. Tracing a pipe line or locating and exposing buried nodes or pipe defects can be done accurately with the built in sonde.
CCTV Pipeline inspections provide you the ability to safely inspect any pipe. Due to the versatile nature of the use of technology in CCTV pipeline inspections, you are able to save time and resources in comparison to more traditional pipeline inspection methods. If you require a pipeline inspection contact Rescue Rod today to find out more about our pipeline inspection services.